Fix use of kineticsSpeciesIndex in diamond_cvd examples

[speth]

Fixes #1806

Changes proposed in this pull request

• Fix incorrect arguments to kineticsSpeciesIndex in both the Python and Matlab versions of the diamond_cvd example

If applicable, fill in the issue number this pull request is fixing

Closes #1806

Checklist

• The pull request includes a clear description of this code change
• Commit messages have short titles and reference relevant issues
• Build passes (scons build & scons test) and unit tests address code coverage
• Style & formatting of contributed code follows contributing guidelines
• The pull request is ready for review

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.26%. Comparing base (70521b7) to head (de03728).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1814   +/-   ##
=======================================
  Coverage   73.26%   73.26%           
=======================================
  Files         383      383           
  Lines       54620    54620           
  Branches     9099     9099           
=======================================
+ Hits        40016    40019    +3     
+ Misses      11601    11599    -2     
+ Partials     3003     3002    -1     

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[ischoegl]

Thanks, @speth!